Python - 创建 Spotify 播放列表重复相同的曲目？

Question

我正在尝试创建一个 Python 程序来根据用户的“心情”创建 Spotify 播放列表；也就是说，用户选择一种特定的情绪，程序返回一个播放列表，其中歌曲（取自用户保存的曲目）的特征表明它们与所述情绪相匹配。但是，我遇到了播放列表由重复 30 次的同一首歌曲组成的问题，而不是 30 首不同的歌曲。总的来说，我对 Python 和编程还很陌生，所以也许这不是一个非常困难的问题，但我正在努力解决这个问题，但我无法做到。

这是我的主要代码中引用此问题的路线（我的完整程序有更多路线，到目前为止一切正常）。所有其他情绪将由其他路线定义，但遵循相同的逻辑。为了更好地理解问题，我会提供任何可能需要的额外代码。

@app.route("/playlist_mood_angry")
def mood_playlist_angry():
    # define mood and create empty track list
    selected_mood = "Angry"
    tracks_uris = [] # we need all the tracks uri to add to the future playlist
    if 'auth_header' in session:
        auth_header = session['auth_header']
        # get user profile and saved tracks
        user_profile_data = spotify.get_users_profile(auth_header)
        user_id = user_profile_data["id"]
        saved_tracks_data = spotify.get_user_saved_tracks(auth_header)
        playlist_name = 'CSMoodlet: Angry'
        playlist_description = "A playlist for when you're just pissed off and want a soundtrack to go with it. Automatically curated by CSMoodlet."

        # go through saved tracks dictionary, get the tracks and for each one check if features average matches selected mood
        for item in saved_tracks_data["items"]:
            track = item["track"]
            features = sp.audio_features(track['id'])
            acousticness = features[0]['acousticness']
            danceability = features[0]['danceability']
            energy = features[0]['energy']
            speechiness = features[0]['speechiness']
            valence = features[0]['valence']
            track_mood = spotify.define_mood(acousticness, danceability, energy, speechiness, valence)

            # if the track's mood is "angry", if the list is not 30 tracks long yet, append it to the list
            if track_mood == "Angry": #if track's mood is not Angry, it will go back to the for loop to check the next one (THIS DOESN'T WORK)
                while len(tracks_uris) < 30:
                    track_uri = "spotify:track:{}".format(track['id'])
                    tracks_uris.append(track_uri)

        # once it has gone through all saved tracks, create the playlist and add the tracks
        new_playlist = spotify.create_playlist(auth_header, user_id, playlist_name, playlist_description)
        new_playlist_id = new_playlist['id']
        added_playlist = spotify.add_tracks_to_playlist(auth_header, new_playlist_id, tracks_uris)
        playlist = spotify.get_playlist(auth_header, new_playlist_id)
        tracks_data = []
        for item in playlist["items"]:
            track_data = item["track"]
            tracks_data.append(track_data)
        return render_template("created_playlist.html", selected_mood = selected_mood, playlist_tracks=tracks_data)

任何帮助将不胜感激。如果有什么不好的解释，我深表歉意，我是 Stackoverflow 的新手，英语不是我的第一语言。

Answer 1

发现错误！ 对于遇到相同问题的任何人，我发现它实际上非常简单。当检查播放列表的长度小于 30 时，只需用 if 循环替换 while 循环。